Fishidea Bluetooth Music Soft Warm Beanie Hat Cap with Stereo Headphone Headset Speaker Wireless Mic Hands-free for Men Women Gift (Black) V3.0+EDR Bluetooth version,available for most of devices with Bluetooth function. Knitted material,fashion and keep warm with answer the phone winter Set-in MIC,available for cell phone to transmit the speaking phone to your audio devices directly so that the user can hand free answering Set-in-Li ion chargeable battery,charge via USB Cable,long stand-by time Support power display on iPhone HTC Samsung etc.